Wireless Communications Delay (Twcy) - Omron WT30 Operation Manual

I/O Response Time
Wireless Communications Delay (T
The response time required until an input signal from the I/O Slave Station is reflected in the Serial Master Sta-
tion's memory is a total of approximately 10 ms per I/O Slave Station plus the input filter time, as follows:
Response time = T × 2 (See note 1.) + Input filter (See note 2.) ( = T1 + T2)
WCY
Note (1) The wireless communications delay is multiplied by two to account for the internal processing of the
Serial Master Station (time required until data is stored in the memory area).
(2) The input filter is 10 ms or 100 ms (depending on the switch setting).
Σ
T = (Sum total of cycle times for all I/O Slave Stations)
WCY
WNODE
Σ
= (10 ms × n stations)
WNODE
Using Relay Stations
The wireless communications delay is doubled when a Relay Station is used.
Σ
= (10 ms × n stations × 2)
WNODE
Example 1: Using one Master Station, four I/O Slave Stations, and an input filter of 10 ms.
10 × 4 × 2 + 10 = 90 ms
Example 2: Using one Master Station, one Relay Station, four I/O Slave Stations, and an input filter of 10 ms.
10 × 4 × 2 × 2 + 10 = 170 ms
The calculations shown here indicate theoretical values and should be considered as a rough guide only. The
actual values obtained will depend on the installation environment.
100
)
WCY
Appendix C